package 尚硅谷;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * @author zhangmin
 * @create 2022-03-24 11:38
 * 验证，lock绑定多个condition
 * 多线程之间按顺序调用，实现 A-> B -> C 三个线程启动，要求如下：
 * AA打印5次，BB打印10次，CC打印15次
 * 紧接着 AA打印5次，BB打印10次，CC打印15次
 * ..
 * 来10轮
 */

class SharaResource{
    private int number=1;//A:1,B:2,C:3
    private Lock lock=new ReentrantLock();
    private Condition c1=lock.newCondition();
    private Condition c2=lock.newCondition();
    private Condition c3=lock.newCondition();

    public void print5(){
        lock.lock();
        try {
            //判断
            while (number!=1){
                c1.await();//可以精准的控制
            }
            //干活
            for (int i = 0; i < 5; i++) {
                System.out.println(Thread.currentThread().getName()+"\t"+i);
            }
            //通知c2
            number=2;
            c2.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
    public void print10(){
        lock.lock();
        try {
            //判断
            while (number!=2){
                c2.await();//可以精准的控制
            }
            //干活
            for (int i = 0; i < 10; i++) {
                System.out.println(Thread.currentThread().getName()+"\t"+i);
            }
            //通知c3
            number=3;
            c3.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
    public void print15(){
        lock.lock();
        try {
            //判断
            while (number!=3){
                c3.await();//可以精准的控制
            }
            //干活
            for (int i = 0; i < 15; i++) {
                System.out.println(Thread.currentThread().getName()+"\t"+i);
            }
            //通知c1
            number=1;
            c1.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
}

public class SyncAndReentrantLockDemo {
    public static void main(String[] args) {
        SharaResource sharaResource=new SharaResource();
        new Thread(()->{
            for (int i = 0; i < 10; i++) {
                sharaResource.print5();
            }
        },"A").start();
        new Thread(()->{
            for (int i = 0; i < 10; i++) {
                sharaResource.print10();
            }
        },"B").start();
        new Thread(()->{
            for (int i = 0; i < 10; i++) {
                sharaResource.print15();
            }
        },"C").start();
    }
}
